High MW plasma protein

I have purified a high MW (>200 kDa) protein from human plasma. The
N-terminus is blocked and I could only get the sequence of a 9 amino-acid
peptide that does not align with any of the sequences from the databanks.
Does anyone know of a list of plasma proteins classified by MW and pI
accessible by WWW? Thank you for your help.
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JJ Feige